1100421431 has 2 divisors, whose sum is σ = 1100421432. Its totient is φ = 1100421430.

The previous prime is 1100421389. The next prime is 1100421451. The reversal of 1100421431 is 1341240011.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100421431 is a prime.

It is a super-2 number, since 2×1100421431² = 2421854651608175522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100421451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550210715 + 550210716.

It is an arithmetic number, because the mean of its divisors is an integer number (550210716).

Almost surely, 2^1100421431 is an apocalyptic number.

1100421431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100421431 is an equidigital number, since it uses as much as digits as its factorization.

1100421431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1100421431 is about 33172.6006065247. The cubic root of 1100421431 is about 1032.4119273644.

Adding to 1100421431 its reverse (1341240011), we get a palindrome (2441661442).

The spelling of 1100421431 in words is "one billion, one hundred million, four hundred twenty-one thousand, four hundred thirty-one".